How can tartar and plaque be removed from teeth without grinding? is there any paste, etc. for it?
The girders of a suspension bridge form an arc. The definition of an arc is a curve or bowed shape, like a part of a circle. An example of an arc is a rainbow. To arc is defined as to make a curved shape or move in a curved path.
And then there's 'arc' with a 'c.' This is the arc of circles. 'Circle' begins with 'c,' so that makes sense. An arc, in terms of a circle, is a part of a circle's circumference, or edge. If you prefer your circles in pie form, then an arc is the flaky crust keeping in that delicious pumpkin filling on your slice.